Mrs. smith has 4 fewer kids in her class than mr. jones has in his class. if mr. jones has δ kids in his class, write an expression that describes how many kids mrs. smith has in her class.
a) δ+ 4
b) 4 - δ
c) δ - 4
d) 4÷δ

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.